ag: Append "-e S" for strings to use single-8-bit-byte to find wide character strings

e.g.
    1. with "-e S", below content is good
    $ echo "<zoom_factors>縮放比率：</zoom_factors>" | strings -e S
    <zoom_factors>縮放比率：</zoom_factors>

    2. w/o "-e S", after strings it screw up
    $ echo "<zoom_factors>縮放比率：</zoom_factors>" | strings
    <zoom_factors>
    </zoom_factors>
Never used, remove it.
pipe.sh: Add "wait" after "spawn" to avoid zombie process.
svn scripts: Add svn-root / svn-url script